Effects of predator removal on mallard duckling survival

  • Published source details Pearse A.T. & Ratti J.T. (2004) Effects of predator removal on mallard duckling survival. Journal of Wildlife Management, 68, 342-350.


This study is summarised as evidence for the following.

Action Category

Control predators not on islands for wildfowl

Action Link
Bird Conservation
  1. Control predators not on islands for wildfowl

    A replicated study in southern Saskatchewan, Canada, in 2000-1 (Pearse & Ratti 2004), found that survival rates of mallard Anas platyrhynchos ducklings was 41-50% higher in four 41km2 grassland-wetland sites where predators were removed (average survival rate of 59% for 686 ducklings from 78 broods), compared with four sites without predator removal (40% survival). Survival was measured until 30 days old, with a total of 686 ducklings from 78 broods studied. A total of 509 predators were removed: red foxes Vulpes vulpes, striped skunks Mephitis mephitis, raccoons Procyon lotor, coyotes Canis latrans, American badgers Taxidea taxus and American mink Neovison vison.


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